Telephone.



'PATBNTED JAN. 15, 19071. .P. EDWARDS. I

TELEPHONE.

APPLICATION FILED MAY 9, 1905.

v v v v VVL I )0. /2- #I I'I'I 1 l'nuelzibz'gzed FRED EDWARDS, OF JEFFERSON, IOWA.

TELEPHONEn Specification of Letters Patent.

Patented Jan. 15, 1907.

Application filed m 9,1905. Serial No. 259,645.

T 0 all whom Tm-my concern:

Be it known that I, FRED EDWARDS, a citizen oi the United States, residing at Jefferson, in the county of Greene and State of Iowa, have invented a certain new and useful Telephone, of which the following is a specification.

The object of my invention is to provide means of simple, durable, and inexpensive construction that may be quickly and easily applied to an ordinary telephone of the type known as the bridging 0r party-line type, which means maybe manipulated by the oporator in such manner that the telephone-receiver will remain operative while the transmitter-circuit will be disconnected to thereby avoid deterioration of the battery of the trans n1ittingcirouit during such times as the operator desires only to use the receiver, and, further, to provide means whereby the transmitting-cir'uit is automatically connected when the elt-pl1one-receiver is suspended from the rcceivenhook.

My invention consists in the construction of the switch HICCdftPlSlH and in its arrangement and combination with a telephone, as hereinafter more fully set forth, pointed out in my claims, an d illustrated in the accompanying drawings, in which- Figure 1 illustrates diagrainmatically a telephone-circuit, showing the position of my improved switch in the transmitting-circuit. Fig. 2 shows a detail elevation of portion of a" telephone with my improved switch device adjacent to the receiver-arm. Fig. 3 shows a detail perspective view of my improved switch-levenand Fig. 4 shows a (let-ail soc tional view of a part of the telephone to illustrate the contact-plates for receiving the switch-arm.

Referring to the accompanying d awings,

I have used the reference-numetal to indicate the battery of the transnnttmg-circuit of the telephone 11 indicates a conductor leading from the battery to my improved l l l g i 1 i l I 1 Ir g i l l l l l 1 ing all this time.

kind in common use on the type of telephones known as the bridging or party-line type.

Adjacent to the receiver-lever 15 is a pivot ed switch-arm 19, having a right-angled extension and also provided with two lugs 21. The numeral 22 indicates a spring-actuated arm notched to receive said lugs 21. This arm is connected with conductor-wire 12.

Adjacent to the switch-arm 19 is a contactplate 23, designed to receive the extension 20 when the switch-lever is in one position, and

this contact-plate is connected with the conductor 11. The said parts are so arranged and disposed relative to each other that When the receiver-lever 15 1s in its normal position-that is to say, held at its lower limit of I movement by the weight of the receiver then the sw1tch-arm 19 15 held in position with its extension 20 1n engagement with contact-plate 23 and a circuit is established through the transmitter-circuit, the said.

switch-arm 19 being yieldingly'held in this position by the spring-arm 22. If the receiver is removed from its lever 15 and said lever is in its elevated position, as shown in Fig. 2, then the operator may grasp the switclrlever 19 and move it to the position shown in Fig. 2, whereupon the circuit through the transmitting-circuit is broken, and the transmitter battery is held inoperative to thereby avoid its deterioration. However, when the switch-lever 19 is in the position shown in Fig. 2 the circuit of the receiver'is not in any way interrupted and the operator at the receiver may receive messages in'the ordinary way, and then when the receiver is again placed on the receiver-lever the circuit through. the transmitting-circuit is reestablished and will remain so until the switch-lever 19 is manually operated.

In practical use it frequently happens that a person must wait at a telephone for a long time to receive a message, and without my improved automatic switch the transmit ting-circuit would be in use and the transmittingbattery subjected to deterioration dur- However, by opening the switch 19 the operator 'ma wait at a telephone to receive a message for an indefinite time and receive said message at any time during this period without using the current of the transmitting-circuit.

I'iaving thus described my invention, what seine:

1 claim, and desire to secure by Letters Petent of the United States therefor, is

l. in. a, telephone having an independent transmittingycircuit the combination of a 5 switch in said circuit automatically cut in an the receiv er levei; movement and cepeo at its lower limit of of being manually cut out when the receivenlever is in its ele vated position.

the type known line type? and transmitting-circuit and e pivoted lever for a receiver of e switch-lever pivotelly sup 1 5 ported adjacent to the receivenlever and Provided with an extension and with two ugs, a notched spring to successively engage said lugs, seid notched spring electrically connected with the transmitter, a contactplate electrically connected with the trans-' I mitter-bettery and arranged in position to t engaged lo the extension of lever when said switch-lever is in one posti tion, said switch position anen 'ed relative to the receiver-levee, so that it Wi lbe moved to position in en ement with its contactlete when said receiver-leveris/et its lower limit of movement.

'Des Moines, lowe,

March 23', 1905. FRED EDWARDS.

Witnesses H. I; JENISON,

J. A. HENDERSON.

the switcl 

